Like Matt said, If you could get as far as the Mackinac bridge
the UP is "another world" well worth visiting, there's also some cool waterfalls up there.
just riding across the "Big Mack" is an adventure especially on a windy day.
Just a little "off topic" ride tale:
Some years back I was coming back the northern route from Sturgis
with a plan to visit some friends in Grand Rapids on the way home.
I stopped for the night within sight of "the bridge" so I could cross it in day light (that was a mistake)
next morning as I passed the toll booth all southbound traffic was diverted to the center lane
because they were sandblasting and painting the superstructure.
The Mackinac bridge is made up of two outside lanes of pavement and two center lanes of steel grating.
It was totally nerve wracking to ride those couple of windy miles on grating
with my rear wheel swaying to and fro and a van right on my tail (no manners)
I sure was happy to get off that bridge.
I stopped at the first rest area I came to,
there was another bike in there,
he was smoking a cigarette and his hands were shaking.
Did you just come across that bridge he asked?
I nodded yes, and he said:
I just wanted to get of my bike and crawl across that bridge.